Dealing with Vodacom is a comedy of errors

Vodacom signed me up for a data contract under false pretenses. The coverage map clearly shows, when zoomed in, that my property is NOT covered. I've been paying through my nose for a service I'm not getting. In addition, the previous times I tried to raise this issue I was completely ignored. Furthermore, for some reason the sloppy agent who signed me to this contract reverted me to an email address which I used 15 years ago and doesn't exist anymore. The single time Vodacom reponded they said they'll contact me by my nonexistent email address.